Defect: Mack Trucks, Inc. (Mack) is recalling certain 2026 Mack GR trucks. The brake drum and steer axle combination are incompatible, which may cause a loss of brake function. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 121, "Air Brake Systems."
Consequence: Reduced brake function can extend the distance required to stop, increasing the risk of a crash.
Remedy: Dealers will replace the steer axle brake drums, free of charge. Owner notification letters were mailed August 27, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0482.
Date: 2025-05-28. Systems: EQUIPMENT, SERVICE BRAKES, AIR.
Defect: Mack Trucks, Inc. (Mack) is recalling certain 2026 Granite trucks. The incorrect drive axle brake drums were installed, resulting in an incorrect load rating on the door jamb label.
Consequence: Incorrect weight rating information on the door can result in overloading the axles, increasing the risk of a crash.
Remedy: Dealers will replace the brake drums, free of charge. Owner notification letters were mailed June 16, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0472.
Do not drive: No. Park outside: No.
Investigations
0 investigations; 0 open.
Manufacturer communications
20 manufacturer communications.
Communications by system
System
Count
ELECTRICAL SYSTEM
9
POWER TRAIN
6
ENGINE
4
AIR BAGS
1
FUEL/PROPULSION SYSTEM
1
SEAT BELTS
1
SERVICE BRAKES
1
STRUCTURE
1
11037728
Date: 2026-09-27. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
Power Cable Alternator Replacement
11037668
Date: 2026-09-17. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
Diagnostic instructions for CAN network communication issues.
11037821
Date: 2026-09-01. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.
Jumper Harness Repair for Version 4 Mack Trucks
11034135
Date: 2026-06-22. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.
The purpose of this CBR is to provide steps on how to correct a customer complaint of DTC P107B86 accompanied With intermittent loss of throttle.
11033141
Date: 2026-05-29. Type: Service Bulletin/Repair Instructions. Systems: AIR BAGS, ELECTRICAL SYSTEM, SEAT BELTS.
Fault diagnostic information for Supplemental Restraint / Airbag Inflation System (SRS)
11032095
Date: 2026-04-25. Type: Over The Air. Systems: POWER TRAIN.
GDC - Transmission Oil Level Sensor
11032086
Date: 2026-04-09. Type: Service Bulletin/Repair Instructions. Systems: POWER TRAIN.
CBR - Mack Carrier Nut Adhesive Change.
11032092
Date: 2026-04-09. Type: Service Bulletin/Repair Instructions. Systems: POWER TRAIN.
CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
11030579
Date: 2026-03-19. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM, UNKNOWN OR OTHER.
CBR - No Start Condition After Over the Air Programing.
11030582
Date: 2026-03-03. Type: Service Bulletin/Repair Instructions. Systems: POWER TRAIN.
CBR - Parker F3 Hydraulic Pump Troubleshooting.
Notes on this record
Complaints from the API and bulk file are merged and deduplicated by ODI number; the API alone misses records.
System and subsystem counts are numbers of distinct complaints, recalls or communications that name them. One record can name several systems, so shares across systems can add to more than 100 percent; a single share never exceeds 100 percent.
Recalls are counted once per campaign, investigations once per action and manufacturer communications once per NHTSA id, even when NHTSA lists several model names for the same record.
A sales denominator is a calendar-year proxy, not the population of vehicles still in use. Rates are copied from verified pipeline output.
NHTSA's complaints API and bulk file list no complaint for this make, model and model year in this data build.